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Cannonball Knucklehead Crankcases

Reproduction crankcases which meet or exceed highest restoration demands. Cast from state-of-the-art materials and machined on CNC equipment for strength and precise fitment. Intended to work with stock or identically constructed engine components. Finished and detailed like the original counterparts so these cases will smoothly blend into your old mill to give it a new life. For ease of installation both case halves are carefully matched and feature pre-installed case bushings, which are line bored and lapped for standard rollers. Cam bushings are already in place and reamed. (for exact measures pls see below).

The selection includes cases with a smooth, uniform glass bead blasted finish and cases with an NOS (new old stock) finish. The latter means the finished cases are not bead-blasted but treated in a traditional process which gives them the appearance of new factory cases that had been sitting on the shelf for 50 years. Perfect for those "patina restorations".

All cases feature laser-engraved CB production numbers, which are registered and filed.

... more
Crankcases by Cannonball; fits Knucklehead 1941-1947; cam shaft bushing ID: 20.7 mm; cast aluminum; replaces OEM 24520-41; Germany
W&W# Picture net price* Available from warehouse Germany?
63-406 Cannonball Knucklehead Crankcases bead blasted $2,099.91 each
in stock
63-416 Cannonball Knucklehead Crankcases "NOS-finish" $2,170.10 each
in stock
* United States of America: Tax free shipping. Please check your local import fees.


  • 83-103

    83-103 Bolt kit; for Crankcases; fits Knucklehead 1940-1947; steel, chrome-plated / parkerized; hex head; replaces OEM 447-30, 447-36, 444-30, 447-48, and 0117; gross ...

  • 84-830

    84-830 Stud kit by Colony; for Cylinder base; fits Big Twin 1930-1977; steel, parkerized; length: 2-5/32”; thread: 7/16”-14 / 7/16”-20; replaces OEM 16831-30; gross ...

  • James Gasket Kits for Engines: Knucklehead 1936-1947

    James Gasket Kits for Engines: Knucklehead 1936-1947 Each complete kit contains all necessary gaskets for the complete overhaul of one engine.

  • Crankcase Roller Bearings - Big Twin 1936-1954

    Crankcase Roller Bearings - Big Twin 1936-1954 Reproductions of OEM  bearing retainers, thrust washers and spacers for all Big Twins 1936-1954.

See also:

  • Truett & Osborn Flywheels

    Truett & Osborn Flywheels Worn flywheels are a major obstacle during the rebuild of an engine, mostly with big expenses required to put them back into service. In such a case it is ...

  • Cannonball Gear Set for OHV 1936-1953

    Cannonball Gear Set for OHV 1936-1953 Opened up the gear case of your just acquired Knuckle or early Pan engine to find a bunch of bits worn beyond repair? This gear set helps you along. It ...

  • Cannonball Knucklehead Tappet Guides

    Cannonball Knucklehead Tappet Guides Knucklehead tappet guides are rare bits and examples, that are still in good working condition, are almost impossible to find. You who are in need, do not ...

  • Cannonball Knucklehead Oil Pump

    Cannonball Knucklehead Oil Pump Reproduction of the early Knucklehead cast iron oil pump as used by the factory 1936-1940, however, the pump will fit all Knuckles and even early Panheads ...

  • Cannonball Aluminum Cylinder Heads for Knucklehead

    Cannonball Aluminum Cylinder Heads for Knucklehead Precise reproductions of stock Knucklehead cylinder heads, cast from aluminum. Besides the significant weight savings of approx. 4 kg per head they dissipate ...

  • Cylinders for Knucklehead

    Cylinders for Knucklehead Replacement cylinders for orignal barrels which have reached their wear limit. Design, finish and workmanship exactly correspond to the stock counterparts.

  • VG Big Twin Rigid Frames

    VG Big Twin Rigid Frames Each frame comes with its year correct toolbox mount.

  • Leineweber Cams Knucklehead

    Leineweber Cams Knucklehead Performance cams for all Knucklehead engines.

Have any questions?

  • Our sales team will be glad to help out:
    Mondays - Thursdays 08:00-17:00 CET, Fridays 08:00-16:00 CET
    Phone: +49 / 931 250 61 16
    eMail: sales@wwag.com